Here are some #, you probably wont need the gaskets.
12 valve valve cover gaskets. 3930906 (6)FYI (not needed for KDP)
Front Seal 3804899
Timing cover gasket 3918673
KDP Tab 3958017
These are Cummins # about #50. 00 worth if you do the KDP and the gasket. Most of the cover gaskets I have seen have been fine, just a little silicone sealer and you should be in good shape. About $1. 00 for the tab and $25. 00 for the seal.
Bob V